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Cortizo COR Vision Sliding Door

Cortizo COR Vision is our most popular sliding door, with just 20mm of aluminium where the panels meet. Panels up to 2.5m wide and 3m tall, made to measure in our Slough factory and fitted from £4,000 + VAT.

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Cortizo COR Vision Sliding Door

COR Vision is Cortizo's slimmest sliding door. Where the panels meet there is just 20mm of aluminium, so from inside you see glass, not frame. We make every COR Vision door in our Slough factory, cut and powder coated to the millimetre for your opening, then fit it.

  • Sightline – 20mm at the central interlock
  • Panels – up to 2.5m wide and 3m tall, and up to 320kg each
  • Layouts – up to 8 panels on up to 4 tracks (8 panels on 4 tracks is exclusive to DTW), pocket doors that slide into the wall, and 90° corners where the corner post slides away with a panel
  • Glass – double glazed units from 28mm to 30mm, U-value from 1.3 W/m²K, sound reduction up to 41dB
  • Security – multi-point locking, with PAS 24 available
  • Colours – any RAL colour. Black and anthracite grey are held in UK stock.

COR Vision suits most extensions and garden openings. If you want triple glazing or bigger panels, look at COR Vision Evolution or COR Vision Plus.

Aluminium sliding doors opening to a scenic outdoor view with a pool and patio area.

Technical Specifications

 
20mm
Sight-line
at the central interlock
Up to
3000mm
Max panel size
tall × 2500mm wide
From
1.3W/m²K
U-value
Up to
41dB
Acoustic
  • Frame depth116mm (2-track) · 182mm (3-track)
  • Max panel weight320kg
  • Glazing28–30mm double glazed units (the frame is too slim for triple)
  • ConfigurationsUp to 8 panels on up to 4 tracks (8 on 4 tracks exclusive to DTW); pocket doors; 90° corners that open fully
  • WeatherAir Class 4 · Water Class 7A · Wind Class C5
  • SecurityPAS 24 available, multi-point locking

Cross Section

Cortizo COR Vision profile cross section

The Cortizo COR Vision profile, cut through to show how the frame and glass fit together.

Glass Options

Every COR Vision sliding door is made with the glass to suit your project. These are the units we fit most, drawn to scale.

Swipe to see each unit →

ArgonLow-EcoatingWarm edgespacerSealant6186OutsideInside30 mm unit
Standard 6/18/6Two 6 mm panes, Low-E coated, with an argon-filled gap of 18 mm. The everyday choice for windows and doors.
ArgonLow-Ecoating8166OutsideInside30 mm unit
Thicker pane 8/16/6Large sliding panels get a thicker 8 mm toughened outer pane, and the very largest 10 mm, for strength and stiffness.
ArgonNoiseQuieterInterlayer0.8 mmLow-Ecoating6166.8OutsideInside28.8 mm unit
Laminated / acoustic 6/16/6.8Two 3 mm sheets bonded to a tough clear interlayer. If it breaks it holds together, and the acoustic interlayer soaks up noise from busy roads.
ArgonHeatreflectedLess heatgets inLow-Ecoating6186OutsideInside30 mm unit
Solar control 6/18/6A coating on the outer pane reflects much of the sun's heat before it gets in. For south-facing glass, roofs and extensions.
In every unit
Warm edge spacer
The bar that holds the panes apart around the edge. It is made from a low-conducting composite instead of aluminium, so the edge of the glass stays warmer, with less heat loss and less condensation. It is filled with desiccant, which soaks up any moisture sealed inside so the unit never mists.
Sealant
The black outer seal bonds the panes and spacer into one unit, keeps the argon in and keeps moisture out.
Low-E coating
An invisible metal-oxide layer on the inside face of the glass that reflects heat back into the room.

COR Vision frames take double glazed units from 28 to 30 mm, so triple glazed (42 mm) units are not available on this system.

We specify the optimal glass configuration for each project based on thermal performance, acoustic requirements and Building Regulations compliance.

Colours & Finishes

Every COR Vision sliding door we make is polyester powder coated in-house to the Qualicoat standard, in any RAL colour, matt or gloss. The colour is guaranteed for 25 years.

Popular Colours

  • RAL 7016 Anthracite Grey
  • RAL 9005 Jet Black
  • RAL 7021 Black Grey
  • RAL 9010 Pure White
  • RAL 9001 Cream White
  • RAL 7012 Basalt Grey
  • RAL 7022 Umbra Grey
  • RAL 6009 Fir Green
  • RAL 8014 Sepia Brown

Special Finishes

  • Heritage Bronze Our Alchemy range, exclusive to DTW. It has no RAL equivalent and is available on every system we make.
  • Anodised Anolok or equivalent anodised shades. Ask us for details.

Matt Jet Black (RAL 9005) and Anthracite Grey (RAL 7016) are held in UK stock for COR Vision sliding doors, Cortizo bifolds and Heritage steel-look, so they are the quickest to make.

Any standard RAL colour is available to order. Ask for a physical sample at your consultation.

FAQs About Cortizo COR Vision Sliding Door at Direct Trade Windows

How much does a Cortizo COR Vision sliding door cost?

A 2-panel COR Vision door 2.0 metres wide and 2.15 metres high starts from £4,000 + VAT, supplied and fitted. A 3-panel door 3.0 metres wide starts from £5,400 + VAT. The price depends on the size, the number of panels, the glass and the colour, and we'll give you a written quote for your exact opening.

How slim is COR Vision?

Where the panels meet, COR Vision has just 20mm of aluminium. It is the slimmest of the Cortizo sliding doors we make; COR Vision Evolution and COR Vision Plus are 25mm.

How big can COR Vision panels be?

Each panel can be up to 2.5 metres wide, 3 metres tall and 320kg. Most homes have 2, 3 or 4 panels, and we can make up to 8 panels on 4 tracks, a COR Vision layout exclusive to DTW. For bigger panels, COR Vision Evolution goes to 3.5 × 3.5 metres and COR Vision Plus to 4 × 4 metres.

Can COR Vision be triple glazed?

No. The COR Vision frame takes double glazed units from 28mm to 30mm thick, with a U-value from 1.3 W/m²K. For triple glazing, choose COR Vision Evolution or COR Vision Plus.

Can COR Vision open round a corner?

Yes. Two runs of COR Vision can meet at a 90° corner. The corner post is fixed to one of the sliding panels and slides away with it, so the corner opens up completely. It can also be made as a pocket door that slides into the wall.

Is COR Vision secure?

Yes. It has multi-point locking, and PAS 24 is available.

What colours can I have?

Any RAL colour, matt or gloss, plus our Heritage Bronze. Black (RAL 9005) and anthracite grey (RAL 7016) COR Vision aluminium is held in UK stock.

How long does it take?

Usually 6 to 8 weeks from sign-off, which is after we have surveyed your opening and you have approved the drawings.

Other Sliding Doors

Two large COR Vision Evolution sliding panels with a slim 25mm central interlock (Cortizo image)

Cortizo COR Vision Evolution

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Elegant aluminium sliding doors with large glass panels.

Cortizo 4700

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Sliding door with large glass panels for seamless indoor-outdoor connection.

Cortizo COR Vision Plus

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Cortizo logo FENSA logo BFRC logo Accreditation logo for Direct Trade Windows company. Constructionline Gold Member badge for trusted building industry standards. Close-up of a window with a focus on the frame and glass. Aluminium window with sleek design and modern finish.